Merge pull request dockersamples#14 from alexellis/alex/ARM_support

Update README.md

Author: Mano Marks

Dockerfile.arm

@@ -0,0 +1,29 @@
+#Latest version of node tested on.
+#FROM node:4.1.2-slim
+FROM alexellis2/node4.x-arm:v6
+
+WORKDIR /app
+
+# Only run npm install if these files change.
+ADD ./package.json /app/package.json
+
+# Install dependencies
+RUN npm install --unsafe-perm=true
+
+# Add the rest of the sources
+ADD . /app
+
+# Build the app
+RUN npm run dist
+
+# Default host is localhost. This is for same-origin policies.
+ENV HOST "localhost"
+
+# Number of milliseconds between polling requests. Default is 200.
+ENV MS 200
+
+#Default port to expose.
+ENV PORT 8080
+EXPOSE 8080
+
+CMD ["npm","start"]

README.md

@@ -15,6 +15,18 @@ In some cases, you need to run the docker with your master node hostname instead
 
 Example: `docker run -it -d -p 5000:5000 -e HOST=node-master -e PORT=5000 -v /var/run/docker.sock:/var/run/docker.sock manomarks/visualizer`
 
+## Running on ARM
+
+[@alexellisuk](https://twitter.com/alexellisuk) has pushed an image to the Docker Hub as `alexellis2/visualizer-arm:latest` it will run the code on an ARMv6 or ARMv7 device such as the Raspberry Pi. 
+
+If you would like to build the image from source run the following command:
+
+```
+$ docker build -f Dockerfile.arm -t visualizer-arm:latest .
+```
+
+## Sample
+
 Here's a sample with one node:
 
 ![Sample image of one node](./samplenode.png)